Fay, Irving W. (Irving Wetherbee), 1861-1936 · New York : D. Van Nostrand company · leaf 139
128 COAL-TAR DYES To develop the color of the dye, this product is oxidized and at the same time a salt-forming condensation takes place between an amino group and a sulphonic group with a result clearly shown in the following graphic formula: … Acid violet 6B. Acid violet 6B. is a violet powder with a bronze lustre which dissolves in water -with a bluish violet color. Hydrochloric acid turns the solution yellow; then nearly colorless. Caustic soda causes a blue flocculent precipitate to form which loses its color on warming. Strong…
Coal-tar colors
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